Lock



V'Patented ug. 17, 1926. I

UNITED STATES WILLIAM CLAASSEN, HOVEN, SOUTH DAKOTA.

LOCK.

` Application filed October 29, 15.323. SeralNo. 671,506.

This invention relates to locks, and more particularly to door locks. v

An object of the invention is to provide a look of very simple construction employing no springs, which is positive in operation. n p

ln the preferred form of the invention, I provide a slidable bolt having an opening therein, and a key adapted to extend through the door, having a depending end portion adapted to enter .said opening.

In the accompanying drawings, I have shown one embodiment of the invention. In

this showing:

Figure 1 is a front elevation of a portion of a door showing the key plate and showing the remaining portions of the lock in dotted lines,

Figure 2 is a rear elevation showing the lock in full lines,

Figure 3 is a vertical sectional View through a portion of a door, the key being shown in elevation in position for locking the door,

Figure 4 is a horizontal sectional view through the bolt showing the opening for the reception of the key, and,

Figure 5 is a perspective view of the bolt and guides or keepers.

Referring to the drawings, the reference numeral 1 designates a portion of a door.

adapted to be arranged in closed position adjacent a door casing 2. The lock forming the subject matter of the present invention consists of a plate 3, adapted to be arranged on the inside of a door and adapted to support suitable guides or keepers 1. guides or keepers are secured to the plate and the door by means of rivets 5 or other suitable fastening elements. These guides are adapt-ed to receive a slidable bolt 6, the end of which is adapted to be received behind the door casing, as shown in Figure.

3 of the drawings,when in-loeked position, to prevent opening of the door. The lower face of the bolt is provided with an enlarged portion 7, adapted to engage the keepers to limit the movement of the bolt. The outer face of the bolt is provided with a de- A key hole 9 is arranged in the door above the bolt and a key hole plate 10 is secured to the front of the door. The key hole plate is provided with an opening adapted to be arranged in alinement with the opening 9 and therear plate 3 is likewise provided with an opening inY vstantially vertical position.

The i alinement' with the opening 9. A key 11` is adapted to be inserted through this open-k ing. The inner end of the key is forked, and is adapted to receive a reduced portion 12`of a pivoted end member 13. Thisend member is secured to the forked end of the.

key by meansr of a pin 1 4. As showmthe reduced portion of the end member and the forked end of the key areprovided with inclined faces 15, which are adapted to engage each other when the end member is in the dott-ed line position .shown in Figure 3 of the drawings to prevent movement of the end member on its pivot. The lower end of the end member is providedwith a linger 16, adapted to be received in the opening 8 in the bolt.

The operation of the device is as follows:

The key is inserted through the opening 9 with `the finger 16 extending upwardly, as shown in dotted lines in Figure 3 of the drawing-s. The outer end of the end member 13 is heavier than the inner end and tends to .swing the end member to a sub- VVith the key in the inverted position shown in dotted lines in FigureV 3 o f the drawings, the inclined faces 15 limit the movement of the end member and retain it in a substantially horizontal position in alinement with the body portion 11 of the key. After the key has been passed through the opening 9, it is turned substantially 130 degrees and the heavier outer end of the end member then swings the end member to a substantially vertical position as shown in full lines in Figure 3 of the drawings. The lfinger 16 then enters the opening 8 and byrevolving the key on it-s axis, the bolt may be locked or unlocked.

Attention is called to the fact that the distance from the key hole to the hole in the bolt must be the same as the distance between the pivot 15 and the finger 16 and the slightest variation will make it impossible to workV the lock. This makes it possible to make practically any number of the locks Vapparently alikeA in external appearance,

of the invention or the .scope of the subjoined claims.

I Claim:

l. A look Comprising a bolt adapt-ed to be slidably mounted on the inner tace of a door, said bolt being provided with a ree-ess in its outer face, and a key adapted to be passed through a key hole opening in the door out of alinement with the bolt, said key being provid-ed Wi th a pivoted end member adapted to assume an angular position with respeet to the body ot the key, a finger formed on the end of `said end portion and adapted. to ent-er said recess, and means tor limi-ting the movement ot said pivoted end portion in one direction.

2. look comprising' a pair of l-eepers adapted to be arranged ony the inner tace of a door and spaced from each other, a bolt slidably mounted in said keepers, said bolt being provided with an enlangedl portion forming a pair ot spaced should-ers adapted to engage the sides of .said keepers to iimit the movement otIV theV bolt, said bolt being further provided with a recess in its outer tace, and a key adapted to be pass-ed through a key hole openingin the door out of alinement with the bolt, said key being` provided With a pivoted end member capable 01"' being` retained in alinem-ent Wit-hthe-body portion ofi" the key when in one position and being adapted to assumean angular positionl by gravity when said key is rotated, and ainger formed on the end portion and adapt.-

ed to enter said recess.

In. testimony whereof, I aliix my signature. Y

WiLLrAM oLAirssEN. 

